(Solved): Fluid Mechanics Determine the available net positive suction head (NPSH) for the system shown in Fig ...

Determine the available net positive suction head (NPSH) for the system shown in Figure 3 . The fluid reservoir is a closed tank with a presure of $?20\mathrm{kPa}$ above water at $70{}^{?}\mathrm{C}(SG=$ $0.978)$. The atmospheric pressure is $100.5\mathrm{kPa}$. The water level in the tank is $2.5\mathrm{m}$ above the pump inlet. The pipe is a $\mathrm{DN}40$ Schedule 40 steel pipe with a total length of $12.0\mathrm{m}$. The elbow is standard $\left(L_e/D=30\right)$ and the valve is a fully open globe valve $\left(L_e/D=340\right)$. The flow rate is $95\mathrm{L}/\min$. Given the viscosity of the fluid is $4.02\times 10^{?4}\mathrm{kg}/\mathrm{m}.\mathrm{s}$. (a) Calculate the head loss in the suction line [16 Marks] $[\mathrm{CO}2,\mathrm{PO}2,C4]$ (b) Determine the available NPSH for the system [5 Marks] $[\mathrm{CO}2,\mathrm{PO}2,\mathrm{C}4]$ (c) Determine the maximum allowable NPSH for the pump in the system [2 Marks] $[CO2,\mathrm{PO}2,C4]$ Figure 3